London - Compact discs containing speeches by Osama bin Laden and other extremist propaganda have been found at three British mosques and police said on Monday they had launched a hunt for the man seen dropping delivering them. "It's disturbing and offensive material," a West Yorkshire police spokesperson said of the discs, describing them as containing "propaganda-type footage. But it doesn't look as if it's new material". The spokesperson, speaking on customary condition of anonymity, said much of the footage on the discs, including older speeches by al-Qaeda leader bin Laden, appeared to have been downloaded from the internet and...